The data, he says, tells us that the poor on average actually stay in their homes for a longer period of time in gentrifying neighborhoods than they do in non-gentrifying neighborhoods, even though their rents go up in gentrifying neighborhoods. Why? Because there are all sorts of reasons people move and stay. When your neighborhood sucks (not Freeman’s word), you have an incentive to move–perhaps to a comparably priced but slightly less sucky neighborhood. But when your neighborhood gets spiffed up by all those Yuppies, you have an incentive to stay–and may be willing to pay more.